Martina, 27, has joined Everton on a free following the expiry of his contract at Southampton, where he played under Koeman and made 36 appearances over two seasons.

Martina joins a list of new recruitments including the likes of Jordan Pickford, Michael Keane and Wayne Rooney.

The Toffees' regular right-back Seamus Coleman suffered a double-leg break while on worldwide duty in March so will miss the start of this campaign, while Koeman was also keen to acquire more defensive options ahead of their return to the Europa League.

He said: "Everton is a big club with big ambitions and I'm really looking forward to joining this group of players and the manager as we try to step forward next season".

Everton manager Ronald Koeman added: "Cuco Martina is an experienced player who can perform in different positions at the back which is important".

"It is also important, with the number of games we will face in the coming campaign, that we have strength and competition in the squad".

'I brought the player to Southampton, so I know what he can do for us here and this is why I've now brought him to Everton.

"When you come to a new club, you need to get to know one another so the training camp in Holland will be great for me and for the other new players as well".

Netherlands-born Martina, who captains Curacao at global level, becomes the Toffees' seventh summer signing, joining Wayne Rooney, Sandro Ramirez, Henry Onyekuru, Davy Klaassen, Jordan Pickford and Michael Keane at the Premier League club. "He is a player who will strengthen our squad and be able to play in different positions when that's needed, too".

The Toffees boss even wanted to sign Martina last summer but saw a £1.6m bid rebuffed by the Saints.